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| | {{pfw:banner.png}} |
| | ====== nRF24L01+ 2.4GHz transceiver ====== |
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| | The [[https://www.sparkfun.com/datasheets/Components/SMD/nRF24L01Pluss_Preliminary_Product_Specification_v1_0.pdf|nRF24L01+]] is a cheap 2.4GHz transceiver module with a low level part of the communication layer already in hardware available. Features of the nRF24L01+ are, adjustable auto retransmit, RF ACK handshake, a 1 to 32 byte payload with variable length (Dynamic Payload), Fifo of 3 deep, 125 selectable frequencies, adjustable output power, CRC, etc. |
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| | **Bidirectional transmit & receive in action on the Egel kit** {{https://user-images.githubusercontent.com/11397265/154851672-ad18f3f9-d11a-442c-b3bd-ba4cf5b9e943.jpg|nRF24 bidirectional test}} |
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| | ===== Software ===== |
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| | * [[en:pfw:spi_msp430_noforth_uscib_spi_msp_v100.f|USCIB SPI MSP v100.f]]**, SPI driver for MSP430G2553 (Github: [[https://raw.githubusercontent.com/project-forth-works/project-forth-works/main/Communication-Protocols/SPI/MSP430/noForth/USCIB%20SPI%20MSP%20v100.f|USCIB SPI MSP v100.f]]**) |
| | * [[en:pfw:wireless_nrf24l01_basic_24l01dn_g2553-01a.f|Basic 24L01dn G2553-01.f]], Basic transceiver routines using 'Dynamic payloads' (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/basic%2024L01dn%20G2553-01a.f|Basic 24L01dn G2553-01.f]]**) |
| | * [[en:pfw:wireless_nrf24l01_transmit_test.f|Transmit test.f]], Transmit command, receive & display data (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/Transmit%20test.f|Transmit test.f]]**)\\ |
| | * [[en:pfw:wireless_nrf24l01_receive_test.f|Receive test.f]], On command increase a counter and sent data back (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/Receive%20test.f|Receive test.f]]**)\\ |
| | * [[en:pfw:wireless_nrf24l01_rangechecker_g2553_usci.f|Range checker G2553 usci.f]], Tools to help testing the range & placement of the transceivers (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/Range%20checker%20G2553%20usci.f|Range checker G2553 usci.f]]**)\\ |
| | * [[en:pfw:wireless_nrf24l01_msp430|MSP430]], implementation(s) of a nRF24L01+ driver for MSP430 (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/MSP430|MSP430]]**)\\ |
| | * [[en:pfw:wireless_nrf24l01_gd32vf|GD32VF]], implementation(s) of a nRF24L01+ driver for GD32VF103 (Github: **[[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/nRf24L01%2B/GD32VF|GD32VF]]**) |
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| | ==== File load order for a test ==== |
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| | * SPI driver for your MPU on two boards |
| | * Adapted version of: **basic 24L01dn G2553-01a.f** file on two boards |
| | * One MPU board with: **Transmit test.f** [[#bidirectional-demo|See demo commands]] |
| | * And one MPU board with: **Receive test.f** |
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| | Load the **Range checker G2553 usci.f** on the boards when you want to check out busy channels or the placing of transceivers.\\ |
| | See [[#range&disturbance-test|here for a description]] of the words. |
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| | ===== Basic nRF24L01+ commands ===== |
| | |
| | ^Command ^Stack ^Function ^ |
| | |''%%SPI-SETUP%%'' |( -- ) |Activate whole nRF24 SPI interface | |
| | |''%%SETUP24L01%%''|( -- ) |Initialise nRF24l01 | |
| | |''%%TRON%%'' |( -- ) |Tracer active | |
| | |''%%TROFF%%'' |( -- ) |Tracer inactive | |
| | |''%%>RF%%'' |( db rate -- )|Set transmit strength & bitrate | |
| | |''%%>LENGTH%%'' |( +n -- ) |Set size of current payload | |
| | |''%%>PAY%%'' |( b +n -- ) |Store byte b at location +n of the payload | |
| | |''%%PAY>%%'' |( +n -- b ) |Read byte b from location +n of the payload | |
| | |''%%IRQ?%%'' |( -- flag ) |Leave true when an nRF24 interrupt has gone off | |
| | |''%%RESPONSE?%%'' |( -- flag ) |Wait a bit, exit & leave true when an IRQ was received| |
| | |''%%CE-HIGH%%'' |( -- ) |nRF24 to transmit modus | |
| | |''%%CE-LOW%%'' |( -- ) |nRF24 to receive or standby modus | |
| | |''%%XEMIT?%%'' |( c -- +n ) |Send byte c, +n are the transmit retries (max=10) | |
| | |''%%XEMIT%%'' |( c -- ) |Send byte c to addressed nRF24 | |
| | |''%%XKEY%%'' |( -- c ) |Receive byte c that is addressed to me | |
| | |''%%SET-DEST%%'' |( +n -- ) |Set address of destination nRF24 to +n | |
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| | <html><a name="bidirectional-demo"></html><html></a></html> |
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| | ==== Bidirectional demo commands ==== |
| | |
| | ^Command ^Stack ^Function ^ |
| | |''%%TRANSMIT1%%''|( +n -- )|Send a ''%%T%%'' every +n milliseconds, display answer| |
| | |''%%TEST1%%'' |( -- ) |Send a ''%%T%%'' every 50 milliseconds, display answer| |
| | |''%%RECEIVER%%'' |( -- ) |Receive command, incr. counter & send it back | |
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| | <html><a name="range&disturbance-test"></html><html></a></html> |
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| | ==== Range & disturbance test commands ==== |
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| | ^Command ^Stack ^Function ^ |
| | |''%%CHECK%%'' |( -- ) |Check all available frequency channels | |
| | |''%%CARRIER%%''|( +n -- ) |Check only frequency channel +n | |
| | |''%%WAVE%%'' |( +n pwr -- ) |Send carrier on channel +n with strength pwr | |
| | |''%%PULSE%%'' |( +n pwr p -- )|Send carrier on channel +n with strength pwr in p millisec. pulses| |
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| | ---- |
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| | ==== Bidirectional transmit & receive test in action ==== |
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| | {{https://user-images.githubusercontent.com/11397265/154994487-bffd043c-1e07-403d-8e72-6fbb5ada894f.mp4}} |
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| | A self constructing mesh network can be found [[https://github.com/project-forth-works/project-forth-works/blob/main/Communication-Protocols/Wireless-Communication/Mesh-network|here]]. |
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